Too Powerful? [COMPLETED!]

Loosely based on the X-Men movies- They say that everything we do, no matter how small, sets large things in motion. 18-year old Alexandra had just joined the X-Men, carrying behind her a dark past and powers so great no other mutant had ever dreamt of having. What if, the smallest, simplest act of joining Xavier's Institute for Gifted Youngsters, had just set a wheel in motion, changing the lives of the X-Men forever?